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BLE ranging key fob antenna
Daová, Hana ; Olivová, Jana (referee) ; Raida, Zbyněk (advisor)
Tato bakalářská práce sestává z návrhu antény do klíčku auta, jež bude schopna pomocí mikrokontroléru metodou channel sounding měřit vzdálenost mezi autem a jeho klíčkem. Anténa je navržena pro pásmo 2,4 GHz, ve kterém pracuje technologie Bluetooth Low Energy. V projektu je porovnáním několika numerických modelů, vytvořených a simulovaných v programu ANSYS HFSS, rozebrána problematika výběru vhodného typu antény. Na základě získaných poznatků je následně nejvhodnější anténa optimalizována pro použití s čipem NXP KW45 a její optimalizovaná verze je pak realizována za účelem experimentálního ověření funkčnosti.
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Design of assembly workplace
Morysová, Lucie ; Jurová, Marie (referee) ; Juřica, Pavel (advisor)
The aim of this thesis is to introduce several proposals aiming to improve upon a selected assembly workplace manufacturing scientific instruments using some of the lean manufacturing tools. The analytical part contains the analysis of the assembly workplace’s layout. An additional method used is an analysis of the time complexity of the assembly workplace which is measured by a selected worker using a pedometer. The result of this thesis are specific proposal variations aiming to improve upon a selected assembly workplace.
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Distance Estimation in Wireless Ad-hoc Network
Botta, Miroslav ; Mráz, Ľubomír (referee) ; Šimek, Milan (advisor)
The work deals with processing of radio received signal strength in IEEE 802.15.4 which communicates in 2.4 GHz ISM band. The signal is processed by the three approximation methods. They are tested for their effectiveness for measuring in different radio environments. Furthermore, the work deals with calculation of the most efficient coefficients for distance calculating by radio transmission fucntions. It defines the issues of such solutions on practical examples. The work also deals with the experimental algorithm for implementing dynamic calibration of the coefficients. It describes the design, processing and verification of this system in practice.
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Parking Assistant
Mareček, David ; Dluhoš, Ondřej (referee) ; Kubát, David (advisor)
This thesis deals with design and implementation of parking assistant. It introduces the types of sensors for distance measurement and possibilities of using camera system. In implementation there are used ultrasonic sensors, namely rangefinder SRF08 and web cameras. User interface that combines data from individual sensors was designed and implemented. Parking assistant provides function for edge detection, sound and graphics signalization together with automatic night mode.
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Echo-Based Distance Measurement on Mobile Phone
Richter, Jiří ; Maršík, Lukáš (referee) ; Černocký, Jan (advisor)
Cílem této práce je vytvoření aplikace pro mobilní zařízení na měření vzdálenosti pomocí ozvěny. Zaměřuje se na testování komponent zařízení a výběr signálu s vhodnými parametry pro měření. První částí práce je vyhodnocení schopnosti zařízení přehrávat a nahrávat zvuk, výsledkem je určení frekvence a síly zvuku, se kterým je zařízení schopno pracovat. Práce dále popisuje algoritmus pro měření vzdálenosti založeny na vzájemné korelaci vyslaného a přijatého signálu. Další částí je popis implementace výše zmíněného algoritmu v aplikaci pro operačním systému Android s řešením komunikace a synchronizace mezi jednotlivými součástmi. Implementace navrženého algoritmu v aplikace je v závěru práce otestována. Na základě zjištěných údajů je možné měření vzdálenosti na mobilním zařízení od půl metru do přibližně tří metrů, s ohledem na okolní hluk, s přesností na desetinu metru.
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Contactless meter of the water level
Pálka, Václav ; Boleček, Libor (referee) ; Říčný, Václav (advisor)
This paper describes the design and construction issues contactless meter water level in an enclosure (typically well) in distance measurement units of meters. The work includes theoretical analysis of possible ways to measure and describe the design, along with the design of individual functional blocks and verifying their function
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Inductive Sensors
Šimberský, Michal ; Havránek, Zdeněk (referee) ; Bejček, Ludvík (advisor)
Bachelor thesis deals with inductive sensors. The thesis introduced the history of sensors, their advantages and disadvantages over other types of sensors. There are described different types of inductive sensors. Each type of sensor is described in terms of physical principles. In thesis there are listed examples of using different types of practice. Preparation was constructed to demonstration the characteristics and differences between eddy currents sensors and inductive oscillator sensors.
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Localization in Wireless PAN
Polok, Zbyszek ; Šimek, Milan (referee) ; Hynčica, Ondřej (advisor)
This bachelor thesis deals with the problem of localization in wireless sensor network. First, ZigBit 900 Modules equipped with chip for wireless communication (AT86RF212) are used to measure the signal strength in the area of Brno University of Technology. The recorded values are then processed using trilateration localization techniques and Euclidean propagation methods. After detecting negative effects on the calculation of the position sought, a filtering method for the calculated values is proposed. In addition, an algorithm determining a sufficient number of reference values for loss rate is also designed to locate all the positions sought. By virtue of these algorithms the trilateration localization method is optimized.
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Design and implementation of an ultrasonic sensor for the educational platform
Slabý, Vojtěch ; Bastl, Michal (referee) ; Spáčil, Tomáš (advisor)
Bachelor’s thesis is focused on a design, fabrication and implementation of an ultrasonic sensor module, which will serve for a distance measurement for an education developer shield based. This sensor should be used as an original module which fits in a requested size format. Now is used a sensor HC-SR04 which exceeds size and voltage needed for a module and uses an adapter, which is not rigid. Bachelor’s thesis is focused on a topic of a existing ultrasound principles and its function for ultrasound distance measurement and calculating necessary values. Thesis includes a list of existing solution for designing a monostatic or a bistatic transdcuers sensors. Our module is compared to those solutions and there is also an overview on a two most used methods for a circuit design which controls a transducer. You can find a designed circuits for creating a prototype PCBs, which heart is a microcontroler PIC16F1769. Programming is handled by a PicKit 3, MPLab X IDE in „C“ language. Communication with a Jobst shield is handled by SPI. Result of this thesis is a design, fabrication and use of two prototype PCBs. First PCB is not tied by a size request and serves for a basic circuit testing and basic distance measurement and the second PCB is in a desired size and serves for distance measurement testing and communication via SPI. These prototypes were fabricated and tested in a way to fulfill set task goals.
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